docs: def stpool(item, nth, contin, lenout=_default_len_out):
      """
      Retrieve the nth string from the kernel pool variable, where the
      string may be continued across several components of the kernel pool
      variable.
  
      http://naif.jpl.nasa.gov/pub/naif/toolkit_docs/C/cspice/stpool_c.html
  
      :param item: Name of the kernel pool variable.
      :type item: str
      :param nth: Index of the full string to retrieve.
      :type nth: int
      :param contin: Character sequence used to indicate continuation.
      :type contin: str
      :param lenout: Available space in output string.
      :type lenout: int
      :return:
              A full string concatenated across continuations,
              The number of characters in the full string value.
      :rtype: tuple
      """
      item = stypes.stringToCharP(item)
      contin = stypes.stringToCharP(contin)
      nth = ctypes.c_int(nth)
      strout = stypes.stringToCharP(lenout)
      lenout = ctypes.c_int(lenout)
      found = ctypes.c_int()
      sizet = ctypes.c_int()
      libspice.stpool_c(item, nth, contin, lenout, strout, ctypes.byref(sizet),
                        ctypes.byref(found))
      return stypes.toPythonString(strout), sizet.value, bool(found.value)